Boiler.



H. W. BELL.

BOILER.

APPLICATION FILED JUNE 26, 1915..

Patented Jan. 2, 1917.

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, To all whom it may concern;-

HARVEY w. BELL, or PITTSBURGH,PENNSYLVANIA.

. BOILER.

Be it known that I, HARVEY 1V. BELL, a citizen of the United States of America, and a resident of Pittsburgh, Alle heny county, and State of Pennsylvania, have invented certain new and useful Improvements in Boilers, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to steam boilers and has special reference to such as are adapted to be heated by flame from a gas or oil burner.

One object of my invention is to provide a simple and compact boiler of the aforesaid character that shall be particula rly adapted for industrial purposes.

Another object is to provide a boiler that shall be capable of generating steam with great rapidity and efficiency and that shall be inexpensive to construct and small in size relative to its capacity.

Still another object is to provide a boiler in combination with a small fire box of substantially annular form of an oil or gas burner arranged to distribute the heat with special uniformity.

Other objects and advantages of my in vention will be set forth hereinafter, and in order that my invention may be fully under stood I will now proceed to describe the same in the following specification and then point out the novel features thereof in appended claims.

Referring to the drawings: Figure 1 is a sectional elevation of a boiler arranged and constructed in accordance with my invention. Fig. 2 is a transverse sectional elevation of the same, these figures being taken respectively on the lines 22 of Fig. 1 and 11 of Fig. 2.

My invention is not restricted to an industrial boiler or for use with a burner which uses any particular kind of fuel, and I intend that only suchlimitations be imposed as are. indicated in the appended claims. 7

The steamgenerator lO'which embodies my invention comprises a tank or boiler 11 having a water chamber 12 through which extends a plurality of fire tubes 13, and a smoke box 14. The water chamber is short relative to its size, being inclosed by boiler heads 15 and 16 into which the fire tubes are set in the usual manner. A stack 17 extends into the smoke box 14 from the top and an Specification of Letters Fatent.

Application filed June 26, 1915. Serial No. 36,428.

exhaust steam nozzle 18 extends into the smoke box fromthe bottom in alinement with the stack.

it fire box 19 is formed at-the opposite end of the boiler from the smoke box and comprises a metal sheet 20 lined with fire brick 21.

As clearly shown in Fig. 2, the fire box has a tangential neck 22 which gives it a snail shape and provides an inlet 23into which an oil or gas burner 24 extends. The burner is supplied with air through a pipe 25 from any suitable source such as a compressed air reservoir (not shown), and'is supplied with oil through a pipe 26.

ater is supplied to the chamber 12 at the bottom through a pipe 28 and the steam outlet is at the top of the boiler, the steam being delivered through a pipe 29.

An engine exhaust may be connected to the steam exhaust nozzle 18 for the purpose of producing a forced draft from the stack 17.

The burner operates under comparatively high pressure and the flame whirls around the thin, substantially annular fire box 19 in such a way as to distribute the heat with great uniformity, thereby generating steam in the boiler with unusual rapidity. The hot gases are forced through the the tubes 13 and escape from the smoke box 14 through the stack, after giving up a large percentage of their heat.

Attention is directed to the fact that the fire box is very small even in relation to the boiler which is itself small relative to its capacity. It is furthermore, very simple in construction, although it is adapted to generate steam rapidly.

What I claim is:

1. A steam generator comprising a relatively short cylindrical boiler, end heads positively closing the ends thereof, intermediate transverse heads dividing said boiler into a firebox, a water chamber and a smoke box,

a plurality of fire tubes passing through said into a comparatively fiat firebox, a water chamber and a smoke box, a plurality of fire tubes passing through said intermediate heads and forming a communication between the fire box and the smoke box, and a burner extending tangentially into the fire box and adapted to produce therein a Whirling flame in a plane normal to the axes of the fire tubes, a stack extending into the smoke box and having an enlarged inlet, and

" a contracted exhaust steam nozzle in alinewith fire briek and havinga flattened circu- Gdpies of this patent may be obtained for lar transverse section across the top thereof, a Water chamber and a smoke box, a plurality of fire tubes passing through the lower and intermediate portions of said heads and forming a communication between the 'fire box and the smokebox, a burner extending tangentially into the bottom of the fire box and adapted to produce therein aewhirling flame in a plane normal to the axes of the fire tubes, a stack extending into the top of the smoke box and having an enlarged inlet,

and a contracted exhaust steam nozzle extending into the bottom of the fire box in alinement with said stack.

In witness whereof, I have hereunto set my hand this 21 day of June, 1915.

' HARVEY W. BELL.

five cents each, by addressing the commissioner of Patents, i Washington, D. G. i 

